SSP9451

Short Description:

The SSP9451 is a high frequency (1.8MHz) step-down switching regulator with integrated internal high-side high voltage power MOSFET. It provides single 0.6A(or less) highly efficient output with current mode control for fast loop response. The wide input range(4.2V to 40V) accommodates a variety of step-down applications under mobile environment input conditions.Low shutdown mode quiescent current of 1μA is suitable for battery-powered applications. High efficiency at light load condition is achieved by scaling down the switching frequency to reduce the switching and gate driving losses.The frequency folding technique helps prevent the inductance current from running out of control at startup. Hot shutdown provides reliable, fault tolerant operation.

Tags: DC DC Convert, hot-prod, Integrated circuit, Power Management, Step-Down converter

Product Detail

Features

Output 0.6A peak current
230μA operating quiescent current
2 V to 40 V operating input range
500mΩ internal power MOSFET
8 MHz fixed switching frequency
Internally compensated
Stable with ceramic output capacitors
Internal soft-start
Precision current limit without current sensing resistor
>90% efficiency
Low shutdown mode current：<1μA
SOT23-6package

Application

High voltage power conversion
Automotive systems
Industrial power system
Distributed power system
Battery powered system

Parameter table

Absolute Maximum Ratings

Parameter	Symbol	Min.	Max.	Unit
Supply Voltage	VIN	-0.3	43	V
Switch Voltage	VSW	-0.3	VIN(MAX)+0.3	V
BST to SW		-0.3	6.0	V
All Other Pins		-0.3	5.0	V
Continuous Power Dissipation(TA=+25℃)	PD		0.57	W
Junction Temperature	T		150	℃
Lead Temperature	T		260	℃
Storage Temperature	TSTG	-65	150	℃
Operating Junction Temp	TJ	-40	125	℃
Junction-to-Ambient THermal Resistance	θJA		220	℃/W
Junction-to-Case THermal Resistance	θJC		110	℃/W

Electrical Characteristics

Vin=12V,Ven=2V,Tamb= 25℃,unless specified otherwise.

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Feedback Voltage	Vfb		0.778	0.794	0.810	V
Upper Switch ON Resistance	Rsw	Vbst-Vsw=5V		500		mΩ
Upper Switch Leakage	Iswleak	Ven=0V, Vsw=0V		0.1	1	μA
Limiting Current	Ilim			1		A
Transconductance	Gcs	COMP to SENSE		3		A/V
Minimum Operating Voltage	Vin min		4.2			V
UVLO Up Threshold	Vin(UVLO)		3.3		4.2	V
UVLO Hysteresis	Vin(UVLO)hys			0.8		V
Soft-Start Time	Tss	FB from 0 to1.8V		0.5		ms
Oscillator Frequency	Fosc		1.4	1.8	2.2	MHz
Minimum Switch ON Time	Ton min			100		ns
Shutdown Current	Isd	Ven<0.3V		3	15	μA
Quiescent Current	Isq	Vfb=0.9V,No load		200		μA
Thermal Shutdown	Temp			150		℃
Enable up threshold	Venh		1.6		2.0	V
Enable Threshold Hysteresis	En hys			0.6		V
Enable Clamp Voltage	En Vclamp			7.5		V

Order Information

Part No	Package	Manner of Packing	Devices per bag/reel
SSP9451	SOT23-6	Reel	3000

SSP9451

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Product Detail

Parameter table

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SSP9451

Product Catgories

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Product Detail

Parameter table

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